blood gut

Gut-associated lymphoid tissue

The digestive tract's immune system is often referred to as gut-associated lymphoid tissue (GALT) and works to protect the body from invasion. GALT is an example of mucosa-associated lymphoid tissue.


About 70% of the body's immune system is found in the digestive tract. The GALT is made up of several types of lymphoid tissue that produce and store immune cells, such as T and B lymphocytes, that carry out attacks and defend against pathogens.

New research indicates that GALT may continue to be a major site of HIV activity, even if drug treatment has reduced HIV count in the peripheral blood.


Lymphoid tissue in the gut is comprised of the following :

Additional images


External links

  • - "Digestive System: Alimentary Canal: colon, taenia coli"
  • - "Digestive System: Alimentary Canal: esophageal/stomach junction"

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